Yamaha Tri-Moto 175: Which is better? Premix or Fuel Injection?

[Vealmonkey]

The clutch is on the right hand side and it's not a tapered shaft. Did you try adjusting the clutch plates? You should be able to remove the round cover with the dipstick without draining the oil, but be careful and put a catch pan under where the cover comes off of. If the clutches were really worn, the new oil might have just been too slippery for the thin clutches. But you won't know until you adjust the clutch. The clutch fibers aren't real expensive if you have to buy them and if you know someone that has a bead blast cabinet, then I would bead blast the clutch plates to rough them up some. You might want to see about getting a gasket set too if you don't already have one. These things happen sometimes with 20 plus year old machines so don't be discouraged. The kid I bought my yt125 off of, ran synthetic oil and it was too slippery for the old clutches. I replaced the fibers and the plates and the top plate and new springs and regular 10w30 oil and all was well, even better than the old clutches according to the previous owner.

[TriMotoMan]

I would go premix, because the injectors pretty old and might not have a consistant mix.
If you premix you could have it running the way you want it to

[pimpallic]

The clutch is on the right hand side and it's not a tapered shaft. Did you try adjusting the clutch plates? You should be able to remove the round cover with the dipstick without draining the oil, but be careful and put a catch pan under where the cover comes off of. If the clutches were really worn, the new oil might have just been too slippery for the thin clutches. But you won't know until you adjust the clutch. The clutch fibers aren't real expensive if you have to buy them and if you know someone that has a bead blast cabinet, then I would bead blast the clutch plates to rough them up some. You might want to see about getting a gasket set too if you don't already have one. These things happen sometimes with 20 plus year old machines so don't be discouraged. The kid I bought my yt125 off of, ran synthetic oil and it was too slippery for the old clutches. I replaced the fibers and the plates and the top plate and new springs and regular 10w30 oil and all was well, even better than the old clutches according to the previous owner.

I haven't touched it yet since it stopped working. I have a BAD feeling about it though because its not like it just slowly stopped working... I went down a really small hill and when I gave it a bit of throttle, NOTHING at all.

I am pretty sure something just "went" inside, cause it happened so suddenly. , but maybe not

But I guess I'll try adjusting it and seeing what happens.

P.S. How do you adjust the clutch?

[Tecate250]

Is it mint condition? Your lock washer might have broke that holds the clutch basket down. Or your shifter return spring might have broke, not letting it go into gear.

[pimpallic]

It shifts up into first, I can hear it click, but if I pull up again, it goes no further. The bolt (shaft going through the engine behind the cover) with the 2 nuts on it spins back and forth freely, and I think it will disappear into the engine if I were to take both nuts off and push it in (to the left of the engine), but I'm not gonna try that.

Anyways, is just supposed to spin and move side to side, or does it hook or thread into something in the middle or on the otherside?

[pimpallic]

Well I decided to "adjust" the clutch, and now I think I'm screwed. After adjusting, I started it and I tried shifting, and then I heard a really loud rattling sound. So I shut it off, took the cover off, and I found a piece of sheared-off thread from somewhere

So now I don't know where to start, and I don't even know where this piece of bolt came from.

[pimpallic]

ANY help is greatly appreciated on this.

[Vealmonkey]

The bolt could have been something from a previous owner. Did you try putting the cover back on and seeing if the trike would shift? The alternative is to pull the case cover over the clutch and looking to see if you could find where the bolt came from. What about the bolts that hold the little round cover with the dipstick, do any of them seem broken off?

[pimpallic]

I am 99% sure the bolt JUST got broken off, because it started to rattle just when I shifted. The bolt was INSIDE the clutch cover, and all the bolts for the cover itself are fine. The trike shifts, but doesn't go anywhere.

??? ???

[pimpallic]

bump---

Anyone???

[Vealmonkey]

You need to take the covers off and take a look. We can speculate all day by until you look, it won't matter. Get a manual, it will be a big help. Alll is not lost. If the trike is still running, it isn't that bad. It could be the back of the clutch adjusting bolt for all I know. Get yourself a gasket kit too and clean out the insides while you are in there. I don't think it's that bad, but I'm here on the other side of the screen.

[pimpallic]

Ok, thanks, I'll take a look.

[pimpallic]

Ok, it's been a while, but I looked and found out that the bolt and gasket (reference numbers 25 and 26 in the diagram) were not even there, so I'm suspecting that was the thread I found, although I still haven't found the head of it or the gasket.

Besides that, I need to remove the clutch basket, but haven't been able to remove the nut holding it on, it has the same part number as the drive gear nut, which is a normal left-hand thread. My manual says to put a rag between the 2 gears to lock them, but even if I roll the rag really thick, the gears just wind up chewing it up.

[pimpallic]

Got it fixed, the whole clutch basket/assembly was put in wrong. Turns out the bolt and gasket I bought don't even serve a purpose... , it just stops one of the shifter levers from engaging into gear properly. stupid thing.

Anyways it's working and after a bunch of I didn't need to actaully do too much.

[Vealmonkey]

Glad to hear it. Sorry that I wasn't more help, but I thought that it wouldn't have been too bad. Keep the pics coming. Let me know if you need a front fender. I'm pretty sure I have a used fender and I know I have a brand new maier fender if you need it.